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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2008.0539 -- [Debian][Ubuntu] Asterisk Compromised cryptographic keys 23 May 2008 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Asterisk Publisher: Asterisk Project Operating System: Debian based Linux distributions Impact: Access Confidential Data Access: Remote/Unauthenticated CVE Names: CVE-2008-0166 Ref: AL-2008.0059 Original Bulletin: http://downloads.digium.com/pub/security/AST-2008-007.html Comment: In addition to the information in this advisory, the following correction been provided by the Debian project team: Correction: The first fixed version are 0.9.8c-4etch3 (on the etch/stable branch) and 0.9.8g-9 (for sid/unstable and lenny/testing). Plain 0.9.8c-4 (and 0.9.8c-4etch1 and 0.9.8c-4etch2) are vulnerable. - --------------------------BEGIN INCLUDED TEXT-------------------- Asterisk Project Security Advisory - AST-2008-007 +------------------------------------------------------------------------+ | Product | Asterisk | |--------------------+---------------------------------------------------| | Summary | Asterisk installations using cryptographic keys | | | generated by Debian-based systems may be using a | | | vulnerable implementation of OpenSSL | |--------------------+---------------------------------------------------| | Nature of Advisory | Compromised cryptographic keys | |--------------------+---------------------------------------------------| | Susceptibility | Users of RSA for IAX2 authentication and users of | | | DUNDi | |--------------------+---------------------------------------------------| | Severity | Critical | |--------------------+---------------------------------------------------| | Exploits Known | None specific to Asterisk, but OpenSSL exploits | | | are circulating | |--------------------+---------------------------------------------------| | Reported On | 13 May 2008 | |--------------------+---------------------------------------------------| | Reported By | Luciano Bello | |--------------------+---------------------------------------------------| | Posted On | May 16, 2008 | |--------------------+---------------------------------------------------| | Last Updated On | May 22, 2008 | |--------------------+---------------------------------------------------| | Advisory Contact | Mark Michelson < mmichelson AT digium DOT com > | |--------------------+---------------------------------------------------| | CVE Name | CVE-2008-0166 | +------------------------------------------------------------------------+ +------------------------------------------------------------------------+ | Description | The Debian team recently announced that cryptographic | | | keys generated by their OpenSSL package were created | | | using a random number generator with predictable | | | results. This affects Debian's stable and unstable | | | distributions, as well as Debian-derived systems such as | | | Ubuntu. See the links in the "Links" session of this | | | advisory for more information about the vulnerability. | | | | | | Asterisk is not directly affected by this vulnerability; | | | however, Asterisk's 'astgenkey' script uses OpenSSL in | | | order to generate cryptographic keys. Therefore, | | | Asterisk users who use RSA for authentication of IAX2 | | | calls and who use DUNDi may be using compromised keys. | | | This vulnerability affects any such installation whose | | | cryptographic keys were generated on a Debian-based | | | system, even if the Asterisk installation itself is not | | | on a Debian-based system. | +------------------------------------------------------------------------+ +------------------------------------------------------------------------+ | Resolution | Since this is not a vulnerability in Asterisk itself but | | | in a tool that Asterisk uses, there will be no new | | | releases made; however, users who are affected by the | | | Debian OpenSSL vulnerability are strongly encouraged to | | | upgrade their package of OpenSSL to an uncompromised | | | version (version 0.9.8c-4 or later) and regenerate all | | | keys used by Asterisk. | +------------------------------------------------------------------------+ +------------------------------------------------------------------------+ | Affected Versions | |------------------------------------------------------------------------| | Product | Release Series | | |-----------------------------------+----------------+-------------------| | Asterisk Open Source | 1.0.x | N/A | |-----------------------------------+----------------+-------------------| | Asterisk Open Source | 1.2.x | N/A | |-----------------------------------+----------------+-------------------| | Asterisk Open Source | 1.4.x | N/A | |-----------------------------------+----------------+-------------------| | Asterisk Business Edition | A.x.x | N/A | |-----------------------------------+----------------+-------------------| | Asterisk Business Edition | B.x.x | N/A | |-----------------------------------+----------------+-------------------| | Asterisk Business Edition | C.x.x | N/A | |-----------------------------------+----------------+-------------------| | AsteriskNOW | pre-release | N/A | |-----------------------------------+----------------+-------------------| | Asterisk Appliance Developer Kit | 0.x.x | N/A | |-----------------------------------+----------------+-------------------| | s800i (Asterisk Appliance) | 1.0.x | N/A | +------------------------------------------------------------------------+ +------------------------------------------------------------------------+ | Corrected In | |------------------------------------------------------------------------| | Product | Release | |------------------------------------+-----------------------------------| | N/A | N/A | |------------------------------------+-----------------------------------| |------------------------------------+-----------------------------------| +------------------------------------------------------------------------+ +------------------------------------------------------------------------+ | Links | http://www.debian.org/security/2008/dsa-1571 | | | | | | http://wiki.debian.org/SSLkeys | +------------------------------------------------------------------------+ +------------------------------------------------------------------------+ | Asterisk Project Security Advisories are posted at | | http://www.asterisk.org/security | | | | This document may be superseded by later versions; if so, the latest | | version will be posted at | | http://downloads.digium.com/pub/security/AST-2008-007.pdf and | | http://downloads.digium.com/pub/security/AST-2008-007.html | +------------------------------------------------------------------------+ +------------------------------------------------------------------------+ | Revision History | |------------------------------------------------------------------------| | Date | Editor | Revisions Made | |-------------------+----------------------+-----------------------------| | May 15, 2008 | Mark Michelson | Initial advisory | +------------------------------------------------------------------------+ Asterisk Project Security Advisory - AST-2008-007 Copyright (c) 2008 Digium, Inc. 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Previous advisories and external security bulletins can be retrieved from: http://www.auscert.org.au/render.html?cid=1980 If you believe that your computer system has been compromised or attacked in any way, we encourage you to let us know by completing the secure National IT Incident Reporting Form at: http://www.auscert.org.au/render.html?it=3192 =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQCVAwUBSDnusCh9+71yA2DNAQLfeQQAlH+ekIn3qwNetdgYt7zlNJZrOa8/eVif tnhnj+9or7P4SF1KuJaplgaPwE7EbRzfgYGB5DKP7A5kYhuKciLgWpE4+kWIV3N1 HPxyrKvYjJMBJCdD/zoWV6e0nn/dHl7iIgsWZ2gxEUaK4BS7El8fX5jjIEPN8Ai1 Vy3/NYgvq10= =mnqZ -----END PGP SIGNATURE-----